Dr. April L. Marquardt, MD
- Medicare services, 2024
- 402
- Medicare patients, 2024
- 203
- Part D claims, 2024
- 3,638
- Publications
- 2
- Hospital affiliations
- 5
- Practice address
- 1500 E Medical Center Dr, Ann Arbor, MI 48109
- Practice phone
- Call (734) 936-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
University Hospital
School-Based Health Center · Ann Arbor, Michigan
Find Dr. Marquardt's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. April L. Marquardt is a rheumatologist in Ann Arbor, Michigan
Dr. Marquardt practices at University Hospital in Ann Arbor, Michigan.
Dr. Marquardt's NPI, 1235352311, was assigned on April 10, 2007. Dr. Marquardt graduated from Ohio State College of Medicine in 2003. Dr. Marquardt holds Michigan license 4301104281.
- NPI
- 1235352311NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7719058536
- NPI enumeration date
- April 10, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (734) 936-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. April L. Marquardt practices at University Hospital in Ann Arbor, Michigan
Dr. Marquardt's primary practice is University Hospital, at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The practice phone is (734) 936-4000.
- University Hospital1500 E Medical Center Dr, Ann Arbor, MI 48109Phone(734) 936-4000
Source: Dmand AI Affiliation Data
Dr. April L. Marquardt is affiliated with 7 sites of care and 2 medical groups
Dr. Marquardt's primary practice is University Hospital in Ann Arbor, Michigan. Dr. Marquardt is also affiliated with University Hospital. The medical group on file is University of Michigan Health. Dmand AI also links Dr. Marquardt to 4 more hospitals, 1 group practice or clinic and 1 medical group, each named with a free account. Dr. Marquardt's employer is on file too: a school & student health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. April L. Marquardt's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marquardt practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Hospital | Available with a free account |
| +6 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. April L. Marquardt is one of 203 rheumatologists in Michigan
Rheumatology is Dr. Marquardt's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Marquardt is board certified in rheumatology by the American Board of Internal Medicine. Dmand AI has Dr. Marquardt's licenses on file in 3 states: Michigan, Ohio and Nevada.
Specialties and state licenses
- Rheumatology, MichiganPrimary
- Ohio license
- Nevada license
Clinical focus
Dmand AI lists arteritis, arthritis, fibromyalgia and chronic pain, gout, joint arthropathy, joint pain, lupus and muscle pain, fibromyalgia, and limb pain among the conditions Dr. Marquardt treats.
Rheumatologists near Dr. Marquardt
Counts of rheumatologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. April L. Marquardt billed Medicare for 402 services in 2024
CMS data shows 402 Medicare services from Dr. Marquardt across 2 procedure codes in 2024, all of them office visits, for 203 Medicare patients. Medicare paid $35,561 for them.
Dr. Marquardt's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5072024: 40221%
Where Dr. Marquardt's Medicare services took place, 2024
- In an office37593%
- In a facility277%
Dr. Marquardt compared with the Michigan median for rheumatologists, 2024
- Dr. Marquardt
- Michigan median
- Medicare services
- 402vs 400Close to median
- Medicare patients
- 203vs 16225% above
- Part D claims
- 3,309vs 1,1992.8 times
Medians across 198 rheumatologists in Michigan with Dmand AI profiles that report each measure.
Dr. Marquardt's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marquardt and other rheumatologists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. April L. Marquardt treated 203 Medicare patients in 2024, average age 69
CMS counts 203 Medicare patients who saw Dr. Marquardt in 2024. The largest group is 65 to 74, with 101 patients. 75% of them have arthritis, and 65% have high cholesterol. 17% are also on Medicaid. Their average risk score is 1.55, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Marquardt's median patient age at 61, with 74% women.
Dr. Marquardt's Medicare patients by age, 2024
Dr. Marquardt's Medicare patients by sex, 2024
- Women15978%
- Men4422%
Chronic conditions among Dr. Marquardt's Medicare patients, 2024
- Arthritis75%
- High cholesterol65%
- High blood pressure64%
- Mood disorders31%
- Depression29%
- Anxiety27%
- Osteoporosis24%
- Ischemic heart disease23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marquardt's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women74%
- Men26%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. April L. Marquardt wrote 3,638 Medicare Part D claims in 2024
In 2024, Dr. Marquardt wrote 3,638 Medicare Part D claims for 459 patients. 81% of them were for generic drugs. CMS names the drug for 3,309 of them, across 40 drugs with 11 or more claims each, at $3,845,747 in total drug cost. In 2023, CMS named 2,895 claims across 37 drugs.
Dr. Marquardt's Part D claims by kind of drug, 2024
- Generic2,947 claims81%
- Brand-name659 claims18%
- Other32 claims1%
Dr. Marquardt's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Marquardt's Part D claims, 2024
- Opioids3%126 of 3,638 claims
- Antibiotics0%15 of 3,638 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,8952024: 3,30914%
Drugs named by CMS: 40 in 2024, 37 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. April L. Marquardt offers telehealth to Medicare patients
Dr. Marquardt accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Marquardt as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. April L. Marquardt has 2 publications on record
Dmand AI links 2 papers to Dr. Marquardt. Dr. Marquardt's most frequent co-authors are Kevin V. Hackshaw, MD and Rajaie Ahmd Namas, MD.
Dr. Marquardt's most frequent co-authors
Recent publications by Dr. Marquardt
See who Dr. Marquardt researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Marquardt works with, so you can find a warm path to the right rheumatologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. April L. Marquardt has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Marquardt, most recently ACR Fellow in 2014.
Awards and honors for Dr. Marquardt
- 2014
- ACR Fellow
- Undated
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. April L. Marquardt graduated from Ohio State College of Medicine
Dr. Marquardt graduated from Ohio State College of Medicine in 2003. Dr. Marquardt is a member of ACR.
- Medical school
- Board certified in rheumatology
Source: Dmand AI Professional Profile Data
Dr. April L. Marquardt accepts plans from 13 insurance carriers
Dr. Marquardt is in network with 13 carriers, including Aetna, Health Alliance Plan and Priority Health. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Health Alliance Plan
- Priority Health
- United Healthcare
- Blue Cross Blue Shield of Michigan
- HCSC
- Molina
- Blue Cross Blue Shield of Massachusetts
- +5 more carriersWith a free account
Plan types Dr. Marquardt accepts, by number of carriers
- Medicare10
- HMO8
- PPO8
- POS6
- EPO3
- Medicaid3
Source: Dmand AI Insurance Network Data
Sources for Dr. April L. Marquardt's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. April L. Marquardt
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. April L. Marquardt's NPI number?
Dr. April L. Marquardt's NPI number is 1235352311. It was assigned on April 10, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. April L. Marquardt?
Dr. April L. Marquardt is a rheumatologist in Ann Arbor, Michigan. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. April L. Marquardt practice?
Dr. Marquardt practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. Dr. Marquardt's primary practice is University Hospital in Ann Arbor, Michigan. Dmand AI also links Dr. Marquardt to 4 hospitals, 1 group practice or clinic and 1 medical group.
What is Dr. April L. Marquardt's office phone number?
The practice phone on file for Dr. Marquardt is (734) 936-4000.
What is Dr. April L. Marquardt's medical license number?
Dr. Marquardt holds Michigan license 4301104281, one of the licenses on file in 3 states.
Which states has Dr. April L. Marquardt been licensed in?
Dmand AI has state licenses on file for Dr. Marquardt in Michigan (2013 to 2027), Ohio (2003 to 2026) and Nevada (2010 to 2023).
Which hospitals is Dr. April L. Marquardt affiliated with?
Dr. Marquardt is affiliated with University Hospital. Dmand AI links Dr. Marquardt to 4 more hospitals.
What medical group is Dr. April L. Marquardt part of?
Dr. Marquardt is linked to University of Michigan Health. Dmand AI links Dr. Marquardt to 1 more medical group.
Does Dr. April L. Marquardt accept Medicare?
Yes. CMS data shows Dr. Marquardt billed Medicare for 402 services in 2024, and Dr. Marquardt accepts Medicare assignment.
Does Dr. April L. Marquardt offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Marquardt as offering telehealth services.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. April L. Marquardt see?
CMS counts 203 Medicare patients who saw Dr. Marquardt in 2024, with an average age of 69.
Is Dr. April L. Marquardt board certified?
Yes. Dr. Marquardt is board certified in rheumatology by the American Board of Internal Medicine.
What services does Dr. April L. Marquardt bill to Medicare?
In 2024, Dr. Marquardt's most billed Medicare services were office visit, established patient (99214) and office visit, new patient (99204).
Where did Dr. April L. Marquardt go to medical school?
Dr. Marquardt graduated from Ohio State College of Medicine in 2003.
What drugs does Dr. April L. Marquardt prescribe most?
In 2024 Medicare Part D data, Dr. Marquardt's most prescribed drugs by claims were Methotrexate, Hydroxychloroquine Sulfate and Prednisone.
How long has Dr. April L. Marquardt been practicing?
Dr. Marquardt graduated from medical school in 2003, 23 years ago.
Does Dr. April L. Marquardt do research?
Dmand AI links 2 publications to Dr. Marquardt.
Who does Dr. April L. Marquardt publish with?
Dr. Marquardt's most frequent co-authors are Kevin V. Hackshaw, MD (1 shared paper) and Rajaie Ahmd Namas, MD (1 shared paper).
What insurance does Dr. April L. Marquardt accept?
Dr. Marquardt is in network with 13 carriers, including Aetna, Health Alliance Plan and Priority Health. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
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